CN207587875U - A lithium-ion battery with heat dissipation structure - Google Patents

Abstract

The utility model provides a lithium ion battery with a heat dissipation structure, which comprises a battery shell, wherein a heat dissipation ceramic seat is fixed in the battery shell, the heat dissipation ceramic seat is provided with n openings, n is an integer greater than 1, an electric core piece is arranged in each opening, the electric core piece is fixed in the battery shell, and electrolyte is filled in the battery shell; the battery case comprises a metal base layer, a heat conduction insulating layer is fixed on the inner wall of the metal base layer, and a plurality of heat dissipation convex parts are fixed on the outer side wall of the metal base layer; the battery case is fixed with a positive electrode lug and a negative electrode lug, and each electric core piece is electrically connected with the positive electrode lug and the negative electrode lug. The utility model discloses the radiating effect is good, and the heat that produces in the lithium ion battery can be transmitted to the battery case in time to inside heat radiation structure, and outside heat radiation structure can release the heat of battery case to external environment in high-efficiently to ensure that the holistic temperature of lithium ion battery can not be too high, and overall structure is simple.

Description

A lithium-ion battery with heat dissipation structure

technical field

The utility model relates to a lithium ion battery and specifically discloses a lithium ion battery with a heat dissipation structure.

Background technique

Lithium-ion battery is a rechargeable battery. It mainly relies on lithium ions to move between the positive electrode and the negative electrode. It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state, and the opposite is true during discharge.

During the use of lithium-ion batteries, the internal resistance gradually increases, and the current consumes internal resistance to generate heat, which will cause the temperature to rise. If the heat cannot be released in time, the temperature of the lithium-ion battery will rise excessively, which will damage the lithium-ion batteries. The internal structure of the battery shortens the life of the lithium-ion battery and affects the normal use of the lithium-ion battery. In severe cases, it will cause a short circuit of the lithium-ion battery and cause a fire, which poses a safety hazard.

Utility model content

Based on this, it is necessary to address the existing technical problems and provide a lithium-ion battery with a heat dissipation structure that has a good heat dissipation effect and can conduct heat from the inside to the battery case in time, and the battery case can efficiently release heat to the outside .

In order to solve the problems of the prior art, the utility model discloses a lithium-ion battery with a heat dissipation structure, including a battery case, a heat dissipation ceramic seat is fixed inside the battery case, and the heat dissipation ceramic seat is provided with n openings, where n is an integer greater than 1, Each opening is provided with a battery cell, the battery cell is fixed in the battery case, and the battery case is filled with electrolyte;

The battery case includes a metal base, the inner wall of the metal base is fixed with a thermally conductive insulating layer, and the outer wall of the metal base is fixed with a number of heat dissipation protrusions;

A positive pole ear and a negative pole ear are fixed outside the battery case, and each cell is electrically connected to the positive pole ear and the negative pole ear.

Further, the metal base layer is an aluminum alloy layer.

Further, the thermally conductive insulating layer is a thermally conductive silicone layer.

Further, the heat dissipation protrusions are heat dissipation fins.

Further, all the heat dissipation protrusions are fixed with wear-resistant layers.

Further, the wear-resistant layer is in the shape of a net.

Further, the heat dissipation ceramic seat is a beryllium oxide ceramic seat.

Further, the orientations of two adjacent openings are opposite.

The beneficial effects of the utility model are as follows: the utility model discloses a lithium-ion battery with a heat dissipation structure. The heat dissipation structure is arranged inside and outside, and the heat dissipation effect is good. The internal heat dissipation structure can timely dissipate the heat generated in the lithium-ion battery Transfer to the battery case, the external heat dissipation structure can efficiently release the heat of the battery case to the external environment, so as to ensure that the overall temperature of the lithium-ion battery will not be too high, the service life of the lithium-ion battery is long, and the overall structure is simple and the cost is low. lower.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic structural view of the heat dissipation ceramic seat of the present invention.

Reference numerals are: battery case 10, metal base layer 11, thermally conductive insulating layer 12, heat dissipation raised portion 13, wear-resistant layer 14, heat dissipation ceramic seat 20, opening 21, battery element 30, positive pole ear 31, negative pole ear 32, Electrolyte 40.

Detailed ways

In order to further understand the features, technical means, and specific objectives and functions of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Refer to Figure 1 and Figure 2.

The embodiment of the utility model discloses a lithium-ion battery with a heat dissipation structure, as shown in Figure 1, including a battery case 10, a heat dissipation ceramic seat 20 is fixed inside the battery case 10, and the heat dissipation ceramic seat 20 has good insulation performance and good heat dissipation performance, such as As shown in Fig. 2, the heat dissipation ceramic seat 20 is in a folded shape, and the heat dissipation ceramic seat 20 is provided with n openings 21, where n is an integer greater than 1, and each opening 21 is provided with a battery element 30, the battery element 30 is fixed in the battery case 10, and the battery case 10 is filled with electrolyte 40;

The battery case 10 includes a metal base layer 11, the inner wall of the metal base layer 11 is fixed with a thermally conductive insulating layer 12, the thermally conductive insulating layer 12 can effectively prevent the electrolyte 40 from reacting with the metal base layer 11, and at the same time ensure that the heat inside the battery case 10 can effectively pass through the thermally conductive insulating layer 12 is transferred to the metal base layer 11, and the outer wall of the metal base layer 11 is fixed with a number of heat dissipation protrusions 13;

A positive pole tab 31 and a negative pole tab 32 are fixed outside the battery case 10 , and each battery cell 30 is electrically connected to the positive pole tab 31 and the negative pole tab 32 .

The thermal conductivity of the heat dissipation ceramic base 20 is stronger than that of the electrolyte 40, and the twisted and folded heat dissipation ceramics 20 can efficiently transfer the heat generated by each battery element 30 to the metal base layer 11, and the metal base layer 11 cooperates with the heat dissipation protrusions 13 to accelerate The heat is released to the external environment, so as to ensure that the lithium-ion battery will not have various problems such as short life and normal use due to excessive heat accumulation.

The utility model is equipped with a heat dissipation structure inside and outside, and the heat dissipation effect is good. The internal heat dissipation structure can transfer the heat generated in the lithium-ion battery to the battery case 10 in a timely manner, and the external heat dissipation structure can efficiently transfer the heat generated by the battery case 10. Released to the external environment, thereby ensuring that the overall temperature of the lithium-ion battery will not be too high, the lithium-ion battery has a long service life, and the overall structure is simple and the cost is low.

Based on the above embodiments, the metal base layer 11 is an aluminum alloy layer. Aluminum alloy has good thermal conductivity and moderate price, and is a commonly used battery casing material.

Based on any of the above-mentioned embodiments, the heat-conducting insulating layer 12 is a heat-conducting silica gel layer. The heat-conducting silica gel is a high-end heat-conducting compound, which has excellent resistance to alternating cold and heat, aging resistance and electrical insulation performance, and can effectively achieve the effects of heat conduction and insulation. .

Based on any of the above-mentioned embodiments, the heat dissipation protrusions 13 may be protrusions of different shapes. Preferably, the heat dissipation protrusions 13 are heat dissipation fins, and the heat dissipation performance of the heat dissipation fins is better.

In order to further improve the resistance of the battery case 10 to the external environment, based on any of the above-mentioned embodiments, all the heat dissipation protrusions 13 are fixed with a wear-resistant layer 14, and the wear-resistant layer 14 can protect the battery case 10 from external abrasion, etc. damage, effectively prolonging the service life of the battery case 10, preferably, the wear-resistant layer 14 is a nylon layer, and the scientific name of nylon is polyamide, and its outstanding advantage is its high wear resistance.

In order to ensure the heat dissipation performance of the battery case 10 , based on the above embodiments, the wear-resistant layer 14 is in the shape of a mesh, and the meshes in the mesh structure can ensure air circulation, thereby ensuring the heat dissipation effect of the metal base layer 11 and the heat dissipation raised portion 13 .

Based on any of the above-mentioned embodiments, the heat dissipation ceramic seat 20 is a beryllium oxide ceramic seat, and the beryllium oxide ceramic is a ceramic with beryllium oxide as the main component, which has high thermal conductivity, and the thermal conductivity is 200W/(m*K). Very good thermal shock resistance, and good insulation performance.

Based on any of the above embodiments, the orientations of two adjacent openings 21 are opposite, which can improve the uniformity of heat transfer.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (8)

1. a kind of lithium ion battery with radiator structure, which is characterized in that including battery case (10), in the battery case (10) It is fixed with heat dissipation ceramic seat (20), the heat dissipation ceramic seat (20) is equipped with n opening (21), and n is the integer more than 1, Mei Gesuo It states and is all provided in opening (21) there are one battery core part (30), the battery core part (30) is fixed in the battery case (10), the electricity Electrolyte (40) is filled in pond shell (10)；

The battery case (10) includes metal-based layer (11), and the inner wall of the metal-based layer (11) is fixed with thermally conductive insulating layer (12), the lateral wall of the metal-based layer (11) is fixed with several heat bulge portions (13)；

Anode ear (31) and negative electrode lug (32) are fixed with outside the battery case (10), each the battery core part (30) with it is described just Lug (31), the negative electrode lug (32) electrical connection.

A kind of 2. lithium ion battery with radiator structure according to claim 1, which is characterized in that the metal-based layer (11) it is aluminium alloy layer.

A kind of 3. lithium ion battery with radiator structure according to claim 1, which is characterized in that the heat conductive insulating Layer (12) is heat conduction silicone.

A kind of 4. lithium ion battery with radiator structure according to claim 1, which is characterized in that the heat bulge Portion (13) is radiating fin.

A kind of 5. lithium ion battery with radiator structure according to claim 1 or 4, which is characterized in that all institutes It states and is fixed with wearing layer (14) outside heat bulge portion (13).

A kind of 6. lithium ion battery with radiator structure according to claim 5, which is characterized in that the wearing layer (14) in netted.

A kind of 7. lithium ion battery with radiator structure according to claim 1, which is characterized in that the heat dissipation ceramic Seat (20) is beryllium oxide ceramics seat.

8. a kind of lithium ion battery with radiator structure according to claim 1, which is characterized in that two neighboring described The direction of opening (21) is opposite.